Watlow Heater Catalog

Flexible Heaters SERIES EHG ®

Many applications requiring a fixed temperature set point rely on a mechanical thermostat for thermal control. Thermostats have proven, however, to be inadequate for many applications due to long-term reliability issues, such as 100,000 cycle rating and poor temperature control. The SERIES EHG ® thermal solution includes a compact temperature controller, thermocouple sensor and power switching device integrated into the heater’s power cord. The SERIES EHG reduces system costs and lasts substantially longer than a conventional thermostat solution. The evolution of miniature microprocessor technology and Watlow switching technology fostered development of a small, versatile temperature controller and thermocouple sensor that is integrated with Watlow silicone rubber heater products. This device senses the temperature via input from a thermocouple strategically placed on the heater mat. The microprocessor is programmed prior to shipment with an application specific set point. This results in quick delivery of a custom, integrated system. The small thermocouple mass provides superior response to changes in process temperature enabling higher watt density silicone rubber heater designs. These features offer an integrated custom set point temperature controller with superior life span, faster heat-up rates and improved accuracy. The SERIES EHG system has been tested to over four million cycles at rated amperage. Depending on the application, Watlow’s power switching design can last up to 40 times longer than a conventional thermostat.

Features and Benefits Long operational life

• Improves system reliability Tight temperature control • Ensures process accuracy Small sensor footprint • Fits with almost any heater • Responds quickly to temperature changes

• Controls high watt densities in low mass applications A single EHG controller can be configured with multiple heaters • Reduces system cost Pre-wired, in-line control • Simplifies installation • Offers two-wire power connection Durable housing with built-in strain relief • Protects electronics • Provides low risk of mechanical damage Manufactured with proven Watlow components • Assures reliable system performance

Typical Applications • Semiconductor processing • Aerospace composite repair • Foodservice equipment • Freeze protection • Life sciences • Telecommunications

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